c) After setting my time zone via ---> Preferences ---> Date and Time to 'America/Vancouver
I checked /etc/timezone and found the right entry - America/Vancouver - and the right time appears in the panel.

After each restart/reboot of the computer, /etc/timezone is overwritten with 'localtime'
and I have to set the timezone new as I did before.

I have a multi system configuration - Ubuntu 16.04 and Windows 10.
I installed Knoppix and I have to select the system I want to use from a grub.conf. menu which comes up after start.
Where do I have the access to enter the cheat code for Knoppix?

I have a multi system configuration - Ubuntu 16.04 and Windows 10.
I installed Knoppix and I have to select the system I want to use from a grub.conf. menu which comes up after start.
Where do I have the access to enter the cheat code for Knoppix?

Here is the entry for Knoppix boot in my grub.cfg. Where would I have to enter the code 'tz-America/Vancouver?